Horseshoe.



J. H. HERSHBERGER.

HORSESHOE.

APPLICATION FILED MAY 13, 1909.

938,858., Patented Nov. 2, 1909.

Snow H 0:

JOHN H. HERSHBERGER, OF WILKES-BARBIE, PENNSYLVANIA.

HORSESHOE.

Specification of Letters Patent.

Patented NOV. 2, 1909.

Application filed May 13, 1909. Serial No. 495,602.

To all whom it may concern:

Be it known that I, JOHN H. HERSHBER- GER, a citizen of the UnitedStates, residing at Wilkes-Barre, in the county of Luzerne and State ofPennsylvania, have invented certain new and useful Improvements inHorseshoes, of which the following is a specification.

The object of my invention is to provide a new and improvedhorseshoe-calk which can be quickly and securely fastened to the shoeand readily removed when worn off, to be replaced by a new calk, withoutthe aid of a blacksmith, and is especially designed to meet conditionswhere there are sudden and violent changes of temperature and it isdesirable to quickly change the calks from dull to sharp or the reverse.

The details of construction, arrangement and combination of parts are ashereinafter described and illustrated in the accompanying drawings inwhich like numerals represent corresponding parts in all the figures.

Figure l is a perspective view of my improvement showing the toe calkand two heel calks in position. Fig. 2 is a vertical sectional elevationof the toe calk. Fig. 3 is a perspective view of a modified constructionof the heel calk. Fig. 4 is a perspective view of the heel calk appliedin Fig. 1.

The shoe 1 is of the ordinary shape and size of a horseshoe, providedwith parallel projections 2 and 3 at the toe, forming a holding recessor socket for the reception of the calk 4, and at the heel, the holdingsockets 8, which may be formed with the longi tudinal slot 14: as shownin Fig. 3 or without it as shown at 7 in Fig. 1 for holding the calks10. At one end of each recess or socket a projection 6 is provided tolimit the 'movement of the calk in one direction and to spread apart theprongs 5 on the toe calk 4t, and the prongs 11 on the heel calks 10. Theprojections 6 may be round or any other suitable form and may be moldedon or otherwise made part of the shoe.

The toe calk 4 is provided with the prongs 5, and the heel calks 10 withthe prongs 11, so formed and arranged that they will not interfere withthe insertion of the calk in its socket, but will be spread apart by thewedging action of the projection 6 when the calk is driven into itsrespective socket and thus securely held until forcibly driven out.

The heel calk 10 may be provided with the rib 13 of sufficient elevationto extend above the side walls of the retaining socket and thus preventundue wear and consequent weakening of the holding flanges 12.

By employing the fixed projection 6 to limit the movement of the calk inone direc tion as well as to spread apart the prongs, the calks are notrequired to have a wedge fit against the side walls of the retainingsocket.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

In combination, a horseshoe provided with an elongated recess havingparallel side walls and retaining flanges, said recess being open atboth ends and a fixed projection with divergent side walls, outside,adjacent one end and in line with said recess, a calk provided with ahorizontal shank of uniform width and thickness to fit said recess andhaving flexible prongs adapted to be opened by the projection when thecalk body is forced against said projection, thereby locking the calkagainst movement in either direction.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN H. HERSHBERGER.

WVitnesses J. Q. CRUELING, CoRA D. CAMPBELL.

